The 2007 Jeep Liberty is available as a 4-door, 5-seat sport utility. Starting at $25,235, the 2007 Jeep Liberty Limited Edition 4x2 is powered by a 3.7L , 6 -cylinder engine mated to an automatic transmission that returns an EPA estimated 17-mpg in the city and 23-mpg on the highway. The top of the line 2007JeepLibertySport 4x4 , priced at $ 23,110 , is powered by a 3.7L , 6 - cylinder engine mated to a manual transmission that returns an EPA estimated 18-mpg in the city and 22-mpg on the highway.